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Soil-plant carbon stocks in the weatherley catchment eight years after conversion from grassland to forestry
Expanded Title:The purpose of this research study was to quantify whether soil-plant carbon stocks in the Weatherley catchment changed markedly within eight years of afforestation of the grassland and to establish whether changes in soil-carbon stocks in the catchment are related either to the tree species or to the soil types. The methodology entailed literature review on carbon sequestration, biomass, change and distribution of soil organic matter and influence of climate, topography, vegetation and land-use. This was then followed by field capturing of soil and plant material data and then quantification of carbon stocks, statistical analyses of soil carbon content to determine whether afforestation had an effect on the carbon content and stocks of soil groups irrespective of tree species. In terms of results, most of the sites showed a decrease in organic carbon stocks, while a few indicated an increase. The rate of increase was similar to that reported in the literature like the case of the subtropical forest soils. In fact the findings were that organic carbon after afforestation was on average lower than before The total nitrogen stocks in the control sites decreased significantly after afforestation. However there were also cases were increase in total nitrogen was observed. Litter nitrogen concentrations tend to increase with increasing stand age.
Date Published:01/03/2013
Document Type:Research Report
Document Subjects:Water Resource Management/IWRM - Catchment Management, Water Resource Management/IWRM - Hydrogeology
Document Keywords:Hydrology
Document Format:Report
Document File Type:pdf
Research Report Type:Consultant
WRC Report No:KV 309/12
ISBN No:978-1-4312-0382-6
Authors:Lebenya RM; van Huyssteen CW; du Preez CC
Project No:K8/936
Originator:WRC
Organizations:Department of Soil, Crop and Climate Sciences The University of the Free State
Document Size:1 382 KB
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